manual/_manual/07_working-with-sessions/01_the-new-session-dialog/01_audio-setup.html
2013-07-02 22:04:52 -05:00

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---
layout: default
title: Audio Setup
---
<p>
This is a tabbed-dialog within the New Session dialog that will
appear only if JACK is <strong>not</strong> already running as you
start Ardour. It provides a simple interface to configure JACK, which
will then be started by Ardour. For more control and options regarding
JACK, it is recommended that you start JACK before using Ardour, via a
JACK control application such as qjackctl (sometimes called "Jack
Control"), JackPilot, etc.
</p>
<h3>Device Tab</h3>
<p> On this tab you can tell Ardour about the device it should use.
The driver setting will tell it what driver to attempt to
access.
</p>
<dl class="wide-table">
<dt>Driver</dt>
<dd>
On Mac OS X this will typically be CoreAudio. On Linux usually
this will be either FFADO or ALSA, depending on whether or not you are
utilizing a firewire device. Advanced users on all platforms may also
use NetJack which provides network audio I/O
</dd>
<dt>Interface</dt>
<dd>
The selector should show all the supported interfaces that the are duplex capable (i.e. support input and output to and from Ardour). <strong>Important</strong> if you are using an Intel Mac running
OS X and the built-in audio interface, you must
first <a href="/setting-up-your-system/using_more_than_one_audio_device">merge
its separate input and output devices into a single "aggregate
device"</a> before Ardour will be able to use it.
</dd>
<dt>Sample Rate</dt>
<dd>
The selector will allow you to select from any sample rate
supported by the device selected above it.
</dd>
<dt>Buffer Size</dt>
<dd>
You can adjust the size of the buffer used by your audio interface
to allow for either lower latency, or lower CPU usage and higher
latency.
</dd>
</dl>
<h3>Options Tab</h3>
<p>
This tab has a few options that should be rarely used by most
users. The Realtime Option allows Jack to run with Realtime
privileges, which allows for smoother audio. The Verbose Output
checkbox is primarily used for troubleshooting, it will cause Jack to
use verbose messaging and output it to the console. The client
timeout will help prevent clients from disconnecting from Jack if they
don't respond to Jack fast enough. The number of ports changes the
total number of ports that Jack will provide to all clients. And the
server dropdown will allow you to change the path to the Jack
executable to match where it is installed on your system.
</p>
<h3>Advanced Tab</h3>
<p>
The Advanced tab lets you to set some advanced settings that
are rarely needed. By default the input and output channels will
automatically try to give you the amount of inputs and outputs as
requested by the software, however some software doesn't always
request as many as you need. This option provides more channels to software that can handle it.
</p>
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